Keri Systems NXT MIFARE (13.56 MHz Smart Card) Compatible Cards & Fobs
Keri Systems' MIFARE-based smart card credentials (DK4-3, DC4-1) operate at 13.56 MHz with NXP MIFARE Classic 4K chips and Keri's proprietary application programming, providing clone-resistant access control for Keri Delta-series readers.
Does American Key Cards make Keri Systems NXT MIFARE (13.56 MHz Smart Card) compatible cards?
Yes — American Key Cards supplies non-OEM Keri Systems NXT MIFARE (13.56 MHz Smart Card) compatible cards and key fobs (AKC Keri MIFARE-Compatible Smart Card), encoded to your facility code and card-number range and ready to use on your existing Keri Systems readers. No hardware changes, no OEM dealer minimums, at a fraction of OEM pricing.
- 13.56 MHz
- Frequency
- Contactless smart card (MIFARE-compliant)
- Technology
- 2
- Bit formats
- 3+
- OEM part nos.
- No
- Cloneable
Keri's DK4 and DC4 credential lines bring 13.56 MHz smart card security to the Keri ecosystem, using NXP MIFARE Classic 4K chips programmed with Keri's custom sector application and optional DESFire EV2/EV3 support on Delta-series readers. Our compatible MIFARE credentials are programmed to Keri's application layout, offering the same reader compatibility at accessible pricing — an important option as facilities upgrade from legacy 125 kHz proximity infrastructure.
Keri Systems NXT MIFARE (13.56 MHz Smart Card) specifications
- Brand / OEM
- Keri Systems
- Technology
- Contactless smart card (MIFARE-compliant)
- Frequency
- 13.56 MHz
- Chip
- NXP MIFARE Classic 4K (DK4 / DC4 series); MIFARE DESFire EV2/EV3 available on Delta-series readers
- Bit formats
- Keri custom MIFARE application (proprietary sector layout with Wiegand output), MIFARE DESFire EV2/EV3 (available on Keri Delta-series readers)
- OEM part numbers
- DK4-3, DK4-3-50, DC4-1
Specifications reviewed June 2026
Our compatible Keri Systems NXT MIFARE (13.56 MHz Smart Card) credentials
American Key Cards manufactures non-OEM credentials engineered to work with your existing Keri Systems readers — no hardware changes, encoded to your facility code and card-number range.
Can Keri Systems NXT MIFARE (13.56 MHz Smart Card) cards be cloned?
No — Keri Systems NXT MIFARE (13.56 MHz Smart Card) cannot be cloned from an existing card. It relies on strong cryptography, so a credential can't be copied off an existing card. That's a security strength, not a limitation of our service — and we'll never pretend otherwise.
13.56 MHz MIFARE Classic 4K with custom application sectors — significantly more resistant to cloning than 125 kHz proximity. MIFARE Classic is not cryptographically unbreakable (CRYPTO1 cipher has known weaknesses) but provides far stronger protection than any 125 kHz format. MIFARE DESFire EV2/EV3 (available on Keri Delta readers) uses AES-128 and is considered high-security.
Where Keri Systems NXT MIFARE (13.56 MHz Smart Card) is used
- High-security commercial facilities upgrading from 125 kHz proximity to smart card credentials
- Keri Delta-series smart card reader installations
- Dual-technology deployments requiring both proximity and MIFARE reading
- Enterprise access control where clone resistance is a requirement
Compatible readers
Related formats
You might also need
Keri Systems MS Format (MicroStar)
Keri MS (MicroStar) is a proprietary 125 kHz proximity format used exclusively with Keri MicroStar readers and PXL-500P Tiger controllers, one of the most widely deployed legacy formats in North American commercial buildings.
View compatible cardsKeri Systems NXT
Keri Systems NXT is a proprietary 125 kHz proximity format with encrypted card-to-reader communication used exclusively with Keri's NetXtreme reader line.
View compatible cardsKeri Systems NXT MIFARE (13.56 MHz Smart Card) — FAQ
Are Keri MIFARE credentials the same as standard MIFARE cards from other brands?
No — Keri programs a proprietary application to specific MIFARE memory sectors with custom encryption keys. A blank MIFARE Classic 4K card will not work in a Keri smart card reader. You need credentials specifically programmed to Keri's application layout.
How secure are Keri MIFARE credentials compared to the 125 kHz Keri MS format?
Significantly more secure. MIFARE Classic 4K with custom sector keys is not trivially cloneable like 125 kHz proximity cards. For the highest security, Keri's Delta-series readers also support MIFARE DESFire EV2/EV3 with AES-128 encryption.
Can Keri MIFARE fobs be used alongside existing 125 kHz Keri credentials on the same system?
Only if you have multi-technology readers that support both 125 kHz and 13.56 MHz. Keri offers multi-technology reader models for mixed-format deployments during a transition period.